Migration Project Examples - System Transitions
Explore migration project examples for legacy modernisation and cloud transition. Phased and big-bang strategies.
Migrations are risky but often necessary. A phased approach with parallel systems, extensive validation and rollback capability minimises downtime and data loss.
Strangler pattern for legacy CRM replacement
A company replaced their legacy CRM not in one go, but migrated module by module to the new system. The old API remained available as a facade.
- Incremental feature migration
- API facade for backwards compatibility
- Dual-write period with verification
Database migration with zero-downtime
A platform migrated from MySQL to PostgreSQL with a blue-green approach. Replication ensured sync, a short switchover for the cutover.
- Logical replication for sync
- Row count verification
- Rollback plan with database snapshots
Key takeaways
- Strangler pattern reduces risk in large migrations.
- Parallel runs and validation are essential for data integrity.
- Communication with users about the migration calendar is crucial.
How MG Software can help
MG Software guides migrations from plan to execution. From data migration to platform replacement — we minimise risk and downtime.
Frequently asked questions
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